This manual covers the Yamaha 25ELD outboard motor, manufactured in 1990. This 2-stroke, 2-cylinder engine features a displacement of 498 cc and produces 25 horsepower. It is water-cooled with a CDI ignition system and a 1.85:1 gear ratio. The outboard motor has a 20-inch shaft length and an approximate weight of 110 lbs, designed for reliable marine propulsion. This comprehensive Service Repair Maintenance Factory Professional Manual in English provides detailed information for the Yamaha 25ELD. It includes essential maintenance procedures, technical specifications, and troubleshooting guidance. This resource is designed to assist owners and technicians in performing routine upkeep, ensuring the longevity and optimal performance of the outboard motor. Key maintenance items covered include lubrication, spark plug gap, fuel type, and recommended intervals for fuel filter and gear lube changes.